Sash-fastener



{No Model.)

G.ME-HL. SASH FASTENER.

1% 570,035 Patented 001;. 27, 1896.

Wibw 3563 Per; K 4

flitorney.

UNITED STATES PATENT OFFICE.

GEORGE MEHL, OF- ST. PAUL, MINNESOTA.

SASH-FASTENER.

SPECIFICATION forming part of Letters Patent No. 570,035, dated October27, 1896.

Application filed February 11, 1895. Serial No. 537,865. (No model.)

To all whom it may concern.-

. Be it known that I, GEORGE MEHL, of St. Paul, Ramsey county,Minnesota, have invented certain Improvements in WVindow- SashFasteners, of which the following is a specification.

My invention relates to improvements in fastening or lockin g devicesfor window-sash, its object being to provide improved attachments forcounterweight-ed window sash which can be set to permit the opening ofeither or both sash to any desired degree, and will then automaticallylock the sash in such position and will permit the partial or completeclosing of either sash, automatically locking the same in newly-adjustedposition and prevent its being again or farther opened until it ismanually operated or tripped.

To this end my invention consists in providing a pair of pivoted dogsarranged in a suitable case, which is sooketed into the window-jamb, thedogs being so positioned that they will respectively engage toothedracks upon the adjacent sash. Springs engaging the dogs hold themnormally pressed outward in bearing contact with the racks. A pivotedarm engaging both dogs operated by a suitable handle projecting from thecase serves to throw both of the dogs out of engagement with the racks,so that the sash can both be readily opened to any desired extent,whereupon by releasing the dogs the sash are locked in such position,from which they cannot be moved in closing direction without unlockingthe fastener.

My invention further consists in the specific features of constructionhereinafter more particularly described and claimed.

In the accompanying drawings, forming part of this specification, Figure1 is a plan view of the lock, showing the projecting dogs and the studto which the handle is attached for turning the dogs to throw them outof engagement with the sash-racks Fig. 2 is a similar view with one sideof the case removed to show the interior arrangement, the dotted linesindicating the dogs in restrained position. Fig. 3 is a side elevationlooking in the direction of the arrow toward Fig. 1. Fig. 4: is a Viewof a window-jamb with the included sash, certain parts being broken awayan d others being shown in dotted lines to indicate the relation of thelock to the sash; and Fig. 5 is a detail edge view of one of the sash,showing the toothed rack arranged thereon.

In the drawings, A represents the locking or fastening device, adaptedto be mortised into the jamb 2 of the window-frame in the positionindicated by the dotted lines, so as to be adjacent to the upper edge ofthe lower and the lower edge of the upper sash when they are closed.

3 represents a dog pivoted in the case of the lock with the offset end 4projecting through the side of the look, as indicated in Figs. 1, 2, and3. The other end, 5, of the dog is engaged by the pivoted lever ortrigger 6, which in turn is operated by means of the cam 7, turned -by asuit-able handle 8, fitted to the stud 9. The dog is held in outturnedposition normally by means of a spring 10.

11 represents another dog having a similar outward or ofiset point 12projecting through the other side of the lock and engaged by a spring13, but also adapted to be tripped or turned against the tension of itsspring by means of the cam-operated lever 6.

Arranged in the edge of the upper sash 14 in position to be engaged bythe dog 3 is a ratchet-toothed rack 15. The lower sash 16 is also fittedwith a similarly-toothed rack 17, with its teeth oppositely arranged tothose of the teeth of the rack 15 and in position to be engaged by thedog 11.

To adapt the lock to thicker sash, the dog 3 may be set to projectfarther out by inserting the bolt 19 through the hole 18, the dog beingheld in position by means of the nut 20 upon the end of the bolt.

I claim- In a window, the combination with the frame and theoppositely-sliding lapped sash, of the lock-case mortised into saidframe adjacent the lapped edges of the sashes and in the pathway of thelower sash, the springcontrolled, vertically-swinging dogs pivoted insaid case, each having. a laterally extending toe projecting outwardthrough an opening in said case and respectively adjacent the face ofsaid sashes, oppositely-inclined ratchet-toothed racks arranged upon theface of said sashes, and adapted to beengaged by said dogs, and therebyrestraining the sashes from opening movement, the cam for operating bothsaid dogs simultaneously against the tension of their springs, thesecond cam operating and looking said first-named cam, and arrangedoutside the path of the lower sash, so as to be engaged by a key orother means without regard to the position of said IO sash.

In testimony whereof I aflix my signature in presence of two Witnesses.

GEORGE MEHL.

Witnesses T. D. MERWIN, MINNIE THAUWALD.

